John f



J. F. ALLEN.. Riveting Machine.

No. 229,195. Rafenfed July 13, lsso.

A @n *Q Qa' N. PETERS, PHOTULITHOGRAPHER. WASHINGTON. D C.

" UNITED STATES PATENT OFFICE. y

JOHN E. ALLEN, OE NEw YORK, N. Y.

MACHINE.

SPECIFICATION forming part of Letters-Patent No. 229,795, dated July 13,1880.

I I Application filed December 1, 1879.

To all @cham it/may concern Beit known that I, JOHN F. ALLEN, of

' New York, in the State of New York, have invented a new and ImprovedBiveting-Machine,

applicable likewise 'or punching and shearing metal plates, of which thefollowing is a speciication.

My invention relates to portable machinery for riveting, punching, andshearing metal plates; and it consists in a combination of partscomprising two levers, vforming an elbow or toggle joint, betweenthe-power employed for operating the machine and hinged or pivoted armswhich carry the dies or other tools employed in the same.

In the accompanying drawings, Figure I represents a frontview of ariveting-machine embodying my invention. Fig. II is a side view of asimilar -machine with a different arrangement otl the several parts andembodying the same principle.

A and B are two arms or` levers hinged together and turning on thecenter C. To one extremity of these arms or levers suitable dies a b areattached to form `the desired head on the rivet whenever these ends areforced together. v

In Fig. I a pressure-cylinder, D, is attached to the. joint-pin O,provided with a suitable valve for admitting the pressure employed'either above or below the piston working in the said cylinder, as maybe required. This valve is operatedv by hand through the lever L. To'the end of the piston-rod, at E,two levers, G and G, are attached, theother ends ofwhich said. levers are jointed at F and H to the projectingends ofthe arms or levers A and B.

When the parts are in the position shown in' the drawings and pressureis admitted below the aforesaid'piston, the end E of the piston-rod willbe moved to a point, E', and the outer ends ofthe rods or levers G and Gwill move from F and H to F and H, thereby moving the Outer orprojecting ends of the levers A andB together, and causing the otherends of said arms,to which the dies c and b are attached, to moveacorresponding distance apart to move the dies over and above theprojecting part of the newly-inserted rivet, ready for heading the same..When one of the said dies has been placed over the head of the rivetthe pressure is admitted into the cylinder D to force thecylinder-piston down again, whereby the ends of the rods G and G', andconsequently the ends of4 the arms A B, to which these rods G G areattached, will be forced outward again, whereby the lower ends ofthesaid arms, containing the dies a and b, will be forced together to actupon the rivet to form the desired `head by compressing or squeezing themetal into the properly-shaped die.

When the machine is to be used for punching or shearing,-suitable toolsfor either of these purposes must be substituted in place of the saiddies u and b.

By this application of an elbow or toggle jointJ between the power `andthe arms a very compact, light, and portable machine can be constructed,and a machine with a cylinder of eight inches in diameter and akpressure of from sixty to seventy-five pouridsi'per square inch will besufficient to form a head on a rivet one and one-fourth inch indiameter.

In the machine represented in Fig. II the same parts are combined andoperate on the same principle; but this arrangement allows thedistancefrom the center of the joint-pin (l to the center of the dies a and b,or the length of this leverage, to be made any desired length with`outgreatly increasing the size or weight of the machine.

In this Fig. II, A and B are the two arms, join ted together at G, andhaving on their y other ends the dies or other tools, as shown at a andb. To a projecting part, B', of the arm B the cylinder D is hinged. Theend of the piston-rod E is connected, through a rod, G, with thel arm Bat F, and through rods G with the arm A at H.

The parts being in the position shown, the outward motion of thepiston-rod (supposing the arm B, and consequently the center F, toremain stationary) will cause the rods G and G' to move into theposition indicated by the dotted lines, whereby the arms A and B will bemoved apart to admit the machine to be moved over the rivet to beoperated upon.

When one of the dies hasbeen placed over the head of the rivet, and thepiston and pisv ton-rod are forced inward, the arms A and B will bebrought together again as the three centers E, F, and H are brought in astraight IOO line, or nearly so, the rods G and G' forming the elbow ortoggle joint, and the dies will act upon the rivet to form the desiredhead by compressing or squeezing the metal into the 5 properly-shapeddie.

The machines are suspended and balanced on pins J, one of which projectsat each side ofthe same.

Instead of using two levers turning on a 1o center, a solid jaw may bemade with a suitable projecting arm, to which the cylinder is attached.Into the lower part of this jaw a die similar to a may be attached,while the upper die may be made capable of sliding 15 through a suitablehub or boss made in the upper part of this jaw. The rods G and G beingarranged similar, as represented in Fig. II, except that the rods G willbe attached to the upper part of the jaw, and the rod G to zo the upperend of the movable upper die, which passes through the hub or boss insaid jaw, the operation of this machine will be similar to that of themachine represented in Fig. II; but by this arrangement a perfectstraight or parallel motion between the dies will be ob- 25 tained.

What I claim as my invention, and desire to secure by Letters Patent,is-

In a riveting, punching, or shearing machine, the combination of thepressure-cylinder 3o and piston, the piston-rod, the rods G and G',forming an elbow or toggle joint, and the hinged arms A and B, withsuitable dies or. other tools, arranged and operating substantially inthe manner and for the purpose set forth.

JOHN F. ALLEN.

Witnesses:

HENRY E. ROEDER,

HENRY VAN BLARGOM.

